Aug 31, 2016 11:22 PM
NH1 First Alert Weather: Watching Hermine & The Weekend
NH1 Chief Meteorologist
As the upper level flow flattens early today, a cold front will slow to a crawl as it hits southern NH and the coastal plain, this will keep a fair amount of clouds around and linger the threat for a shower in these areas into at least early afternoon on Thursday. Most of the time will be dry with more clouds than sun for the morning hours. The front should eventually move offshore with some clearing, from N to S, during the mid afternoon. Highs will range from the upper 70s to around 80 in the south to only around 70 in the north behind the front. Thursday night will see better clearing. It will be cooler everywhere with lows near 50 in the north to around 60 on the coast as humidity falls.
High pressure building in from the west on Friday will produce a mix of sun and clouds and seasonable temps across the region. High temps will range from the lower 70s north and in the mid 70s south. High pressure will crest over the region Friday night. Clear skies and light winds will allow for good radiational cooling with lows ranging through the 40s north and lower to mid 50s south.
High pressure will slide offshore on Saturday. Expect the majority of the day to feature abundant sunshine with highs generally ranging through the 70s from north to south. Winds will be turning onshore for an afternoon sea breeze to keep it cooler at the beaches. Are real pleasant feel this weekend, but the waning moment of summer will be felt.
Forecast confidence drops off after Saturday this as remains of Tropical Storm Hermine will be heading up the coast. With a more inland track it will lose it's tropical personality, but still provide gusty winds and heavy rains for the Carolinas to the Mid-Atlantic. There are still some differences in timing and track of this system as our models continue to work on the the eventual track this could take.
Blocking high pressure should hould on long enough with dry air to allow for another nice day Sunday. As the low stalls south of Long Island the worst of the wind and waves will be pounding the mid-Atlantic this weekend. Depending on the placement of the low, clouds could begin to spread into NH later Sunday with the chance of some light rain into southern zones late Sunday night into Monday. If the clouds begin to spread north, we can expect them to hang around and thicken into Labor Day with a little light rain into coastal and southern town Monday. Cool onshore winds will keep temps near 70-73. In any case...expect upper level ridging building in from the west on Tuesday to finally push this weakening system eastward. Expect both days to be sunny and warm with highs pushing well into the 80s by Wednesday.